Home / 142,775.10-197,031-79,114.26

Finding the Fourth Proportional to 142,775.10, 197,031 and 79,114.26

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Solution

The fourth proportional to 142,775.10, 197,031 and 79,114.26 is: 109,178.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,775.10 : 197,031 = 79,114.26 : x
  2. Step 2: Convert to fraction form
    142,775.10/197,031 = 79,114.26/x
  3. Step 3: Cross multiply
    142,775.10x = 197,031 × 79,114.26
  4. Step 4: Simplify right side
    142,775.10x = 15,587,961,762.06
  5. Step 5: Solve for x
    x = 15,587,961,762.06/142,775.10
  6. Step 6: Final answer
    x = 109,178.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.